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Microstructural aspects of fracture in polypropylene and in its filled, chopped fiber and fiber mat reinforced composites

  • Chapter
Polypropylene Structure, blends and Composites

Abstract

Isotactic polypropylene (PP) has the highest yearly consumption rate among the polyolefins because its property profile can be tailored easily upon request both chemically (polymerization, copolymerization, grafting, reactive blending) and physically (blending, adding of fillers and reinforcements). By a proper upgrading method the properties of PP meet the requirements of speciality and even those of engineering thermoplastics (technopolymers). The designation ‘engineering thermoplastic’ is principally related to given stiffness (eventual toughness) and heat resistance characteristics (dimensional stability), which can be reached by filling and reinforcing the PP. The resulting PP grades of improved properties have found widespread applications in the fields of automotive, appliances, and household items. The property control of the upgraded PP (especially toughness performance) required additional testing and evaluation methods, including those of fracture mechanics which provide material constants. The fracture mechanics data are more informative than those derived from standardized methods (in the case of toughness, e.g. Charpy, Izod, falling weight, Dynstat measurements) which can hardly be compared with each other. The use of filled and reinforced PPs in parts exposed to cylic loading also necessitates fatigue characterization. This can also be performed on the basis of the fracture mechanics.

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Authors
  1. J. Karger-Kocsis
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Editors and Affiliations

  1. Institute for Composite Materials Ltd, University of Kaiserslautern, Germany

    J. Karger-Kocsis (Prof.) (Prof.)

  2. Department of Plastics and Rubber, Faculty of Chemical Engineering, Technical University of Budapest, Hungary

    J. Karger-Kocsis (Prof.) (Prof.)

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© 1995 Springer Science+Business Media Dordrecht

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Karger-Kocsis, J. (1995). Microstructural aspects of fracture in polypropylene and in its filled, chopped fiber and fiber mat reinforced composites. In: Karger-Kocsis, J. (eds) Polypropylene Structure, blends and Composites. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0523-1_4

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  • DOI: https://doi.org/10.1007/978-94-011-0523-1_4

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-010-4233-8

  • Online ISBN: 978-94-011-0523-1

  • eBook Packages: Springer Book Archive

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